Process of making coated nails.



Patented October 25, 1904..

UNTTED STATES PATENT OEEicE.

WILLIAM S. ROGERS, OF CLEVELAND, OHIO, ASSIGNOR TO J. C. PEARSON COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

PROCESS OF MAKING COATED NAILS.

SPECIFICATION forming part of Letters Patent No. 773,525, dated October 25, 1904.

Original application filed March 31, 1903, Serial No. 150,356. Divided and this application filed June 14, 1904. Serial No. 212,581.

g (No specimens.)

To all whom, it nuty concern.-

Be it known that I, l/VILLIAH S. RoeERs, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a certain new and useful Improvement in Processes of Making Coated Nails, of which thefollowingis aspecification.

This invention is a division, of my application, Serial No. 150,356, filed March 31, 1903,

IO for a certain new and useful improvement in coated nails and process for coating the same and is directed to the process of making such nails described in said application.

My process for the manufacture of coated 5 nails is as follows:

Rosin is dissolved in gasolene or some readily-volatile solvent in about the proportion of thirty-two parts, by weight, of rosin to ninetysix parts, by weight, of gasolene, and a small quantity of a non-drying oilsuch as fish-oil, castor-oilgrosin-oil, or similar oil is added to this solution in about the proportion of one part, by weight, of such oil to the above-given proportions of solution. It will be found 5 that the above amounts of rosin and fish-oil will be almost entirely dissolved in the abovenamed proportion of gasolene, especially if the mixture is allowed to stand for some time, although without the fish-oil the solutionof 3 the rosin would be far from complete. Other non-drying oils assist in the solution in the same way in varying degrees, castor-oil being more effective in this respect than fish-oil,

of the small amount of non-drying oil the coating is tough and not brittle, and the nails so coated will not stick to each other.- As the nails will not stick to each other, it is not necessary to break them apart when they have 5 dried or on removing them from the kegs in which they are packed, and there is no roughness or break in the coated surface such as would be found if the surfaces were brittle and had stuck together and been separated, as

'would often be necessary if the coating did not contain the non-drying oil.

The amount of the non-drying oil contained in the resinous solution is so small in proportion that it Will, not be unpleasantly perceptible to any extent in the handling or use of the article, While it is sufficient to add toughness to the coating and prevent the coating from becoming brittle and flaky and to prevent the coated articles from sticking together 5 after dipping and while they are drying and to increase the holding power of the nail when driven. A less amount even than indicated will be sufficient for practical purposes, and if a very dry coating is wanted it is an 7 advantage to add about one part, by weight, of metallic resinatesuch as lead resinate or manganese resinate, or bothto each one hundred parts of the non-drying oil. This is most conveniently done by adding the resinates to warm oil before the non-drying oil is mixed with the rosin and gasolene.

The so-called cement-coated nails which have been for a long time sold in large quantities have a coating which softens by heat and friction caused by driving the nail into the wood, and the coating is stripped from the nail and remains about the'head of the nail near the surface of the first piece of wood penetrated. In consequence of this stripping of the coating from the cement-coated nails now sold the greater part of the nail is not protected from moisture striking its sides, but only from moisture which might enter near the head of the nail, and the lower part of the 9 nail often has no substantial coating either to protect the nail from moisture or to adhere to the second piece of wood into which the nail is driven, whereby a large part of the value of v the coating is lost.

The coated nails made in accordance with this specification have a tough coating, which will not strip off when the nail is driven into the Wood, although it will soften sufliciently by the heat developed in driving to make the nail very tenacious to the material into which it is driven after the nail has been allowed to cool. The nail will be protected from moisture throughout its length and the benefit of the tenacity of the coating for the entire length of the nail is obtained. Another important feature is that the nail may be drawn from the wood and used again with its coating substantially intact, whereas the coated nails now used when withdrawn from the wood are substantially uncoated nails.

The process of making the composition Without heat and applying it to the nails by merely dipping the nails in the cold solution or pouring the cold solution over the nails and drying the coating by the mere evaporation of the gasolene at ordinary temperatures without artificial heat is a marked improvement over prior processes for coating nails. Great care should be used, of course, to neglect none of the usual precautions to avoid an explosion of the gasolene.

Other substances may be added to the rosin, non-drying oil, and the volatile solvent without departingfrom my invention, and any readily-volatile solvent similar to gasolene may be used, and I desire to be understood as including any such modification within my claim.

That I claim as my invention is The process of manufacturing coated nails which consists in dissolving rosin and a small quantity of a non-drying oil in a readily-volatile solvent, dipping the nails in this composition Without heating, draining off the surplus composition and drying the nails by evaporation of the volatile solvent, substantially as hereinbefore set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM S. ROGERS. Witnesses:

R. B. HOFFMAN,

GEO. H. MA'roHE'rT. 

